Patent RU-2658562-C1 (RU)
Inventor: SAPOZHNIKOV ALEKSANDR ILARIEVICH
IPC: G01R19/165
Filed: 2017-07-03
Granted: 2018-06-21
Abstract: FIELD: test and measurement equipment. 
     SUBSTANCE: invention relates to instrumentation and is intended for the tolerance control of the level of variable signals, including the amplitude of signals of induction phase-sensitive sensors, and can be used in automation and telemechanics systems where high accuracy, speed and noise immunity are required. Object of the invention is to control the level of the signals of phase-sensitive sensors with a high noise immunity of the device and to preserve the high speed of the device. AC voltage level control device comprises a voltage divider, the outputs of which are connected to the first inputs of the first and second threshold elements that are connected by the second inputs to the input terminal of the device, the first and fifth triggers and an actuator. According to the invention, an inverter, a frequency halver, a first (6), second, third and fourth matching elements, a second, third, fourth, sixth, seventh and eighth triggers, a first and second OR elements, while the output of the first threshold element is connected to the inputs of the first and second matching elements, and the output of the second threshold element is connected to the inputs of the third and fourth matching elements, the second input of the first and third matching elements, the inputs of the inverter and the frequency halver are connected with the clock voltage terminal, the output of the inverter is connected to the second inputs of the second and fourth matching elements, the setting inputs of the first, second, third and fourth triggers receive a signal of the logical unit, the synchronization inputs of the first and second triggers are connected to the output of the first matching element, the synchronization inputs of the third and fourth triggers are connected to the output of the third matching element, the outputs of the first and second triggers are connected to the setting inputs of the fifth and sixth triggers, respectively, the synchronization inputs of which are connected to the output of the fourth matching element, the outputs of the third and fourth triggers are connected to the setting inputs of the seventh and eighth triggers, respectively, the synchronization inputs of which are connected to the output of the second matching element, the direct output of the frequency halver is connected to the reset inputs of the first, third, fifth and seventh triggers, and its inverse output is connected to the reset inputs of the second, fourth, sixth and eighth triggers, the outputs of the fifth and sixth triggers are connected to the inputs of the first OR element and the actuator, the outputs of the seventh and eighth triggers are connected to the inputs of the actuator and the second OR element, the output of the actuator is primary, and the output of the first and second OR elements are additional outputs of the device. 
     EFFECT: possibility of threshold monitoring of the level of signals with different phases (0° or 180°) relative to the clock voltage with a high noise immunity of the device, expressed in its protection against false trips when exposed to low-frequency and constant-frequency impulse noise. 
     1 cl, 2 dwg